Lathe-tool.



Patented Feb. 25, I902.

W. F. KOELLER & H. DYER.

L A T H E T 0 O L (Anplic ation filed June 7 (No Model.)

5%. w a 2M. M maizmpd To all whom it may conic! 7 Be it known that we, WILLIAM F. KonLnEn and HENRY DY'ER, citizens of the United States, ,residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements 'in Lathe-Tools and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others 10 skilled in the art to'which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

Our invention relates to lathe-tools, and particularly to screw-cuttinglathe-tools; and its object is to provide. a tool the blade of which is provided with a number of ,cutting edges at each end thereof, together with a holder in which theblade may be securely held for operation of one of the cutting edges Without injury to anyof the others. Each cutting edge of the blade may be used before the tool is required to be removed to be sharp- 2 5 cned, and as the blade we have illustrated as embodyingou rinvcntionhassix cutting edges its utility is apparent. A further object is to provide a tool the holder of which has a screw against which the end of the blade abuts, said screw being adjustably mounted in a movable wedge? shaped block, so that the blade may be read.- ily adjusted and securcl y held and easi-l y and quickly removed when desired.

Referring to the drawings, Figure-l is a side elevation of the tool; 1 ig. 2 is a top plan View thereof. Fig. 13 is a front or end View thereof. Fig. l is a perspccliveviow in detail of the blade.

Referring more particularlyto the drawings, the shank of the tool is represented at U and is adapted to be inserted in the tool-post of a lathe. The socket is indicated at 7 and is Open at both ends or at both top and bottom, extending vertically between jaws '5. The

socket consists of a substantially rectangular recess 8, adapted to receive a close-fitting Wedge-block 9, and within lips 8 of the jaws acute angular grooves 8, adapted to receive 59 the longitudinal edges of the blade 10. The

wedge-block i) is provided at its lower end with a lateral extension .l, having an inter- ATENT O FI E.

ani n; MICHIGAN}.

Aime-sired L.

"eadedbor'e for the engagement of a screw 11, against which the lower end of the blade abuts.

The blade 10 is formed of a piece of steel substantially triangular in cross-section, the ends of which are slightly concave, as at 10%, and formed at each corner into a cuttingpoint lOl', adapted for cutting threads in screws, bolts, and the like.

When the wedge'block and blade are fitted in the socket, with the lower end of the blade bearing against the inner end of the screw 11, pressure orthrnst on the blade, as in use, causes the wedge to tightly bind the blade in the socketagainstmove'ment or displacement. The required adjustment of the blade can be secured by relative rotation of the screw '11. The blade is heldin the holder in such man nor as not to injure any of its cutting-points, and it isevident that when a point becomes dull the blade may be easily and quickly removed and turned to present another point :to the work. -The life of the blade is thus prolonged and the time of the workman saved.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is-

1. In a lathe-tool, in combination, a holder, a socket therein, a blade and a wedge adapted to beheld in the socket, said wedge having a lateral projection and means carried by the projection to adjustably support the blade.

L. In a lathe-tool, in combinationga holder, a socket therein, a triangular blade having cutting-corners at both ends, a wedge having a projection, the blade and wedge being held within the socket, and a screw fitted to the projection and adapted to support the blade, the upper end of the screw bearing against the lower end of the blade within its cutting COIHGIS.

3. In a lathe-tool, in combination, a holder, a socket therein, a blade, a sliding block in the socket adapted to adjustnbly bind the blade as a wedge and a lateral projection on the block adapted tosupport the blade at an abutment.

4. 1n a lathe-tool, in combination, a holder, a socket therein, a blade, a wedge having a projection, and ascrew fitted to the projection and adapted to support the blade.

Ina lathe tool, in combination, a holder,

a socket therein, and a blade eomprisihg a metal block having cutting edges atboth ends thereof snide wedge having a projection *ex tending uhder the lower end of the-block and a screw fitted to the projection and adapted to bear against thelower within thecutting edges.

6. In a, lathe tool, in combination, a holder,

. a SOCkQt lJh9I8lIi havinga longitudinal from;

end of the block tar-es impresence of two witnesses.

vi'edge between the blade and the back of'the socket, saidwedge having a. projection ex- 15.

tendingunder the lower end of the blade, and a screw fitted to theprojection and adapt-ed tosupport; the blade.

In testimony whereof we aflix our signw ILLIAM F. KOELLER. HENRY .DYER. Y Witnesses; o W. A-. Dmmr, l J. GORDON. 

